Test Step 1 - ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
NOTE:
If an O2 sensor signal circuit is shorted to voltage, all O2 sensor voltage readings displayed on the scan tool will be approximately 5.0 Volts. Diagnose the sensor that set the most current DTC.
- Start the engine and allow it to idle for at least 60 seconds.
WARNING:
When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.
- With the scan tool, read the active DTCs.
Is the DTC Active at this time?
Yes
No
- Perform the Checking for an Intermittent DTC diagnostic procedure. Refer to Checking For An Intermittent DTC .